Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Cash and securities segregated, at cost	$ 859,448	$ 1,511,916
Limited partners units issued (in units)	286,609,212	285,979,913
Limited partners, units outstanding (in shares)	286,609,212	285,979,913